=>3B=3^2+3^3+3^4+...+3^2006
=>3B-B=3^2006-3
=>2B=3^2006-3
=>2B+3=3^2006
**** cho mik nha!
B = 3 + 32 + ... + 32005
3B = 32 + 33 + ... + 32006
3B - B = 32006 - 3
2B = 32006 - 3
=> 32006 - 3 + 3 = 32006
viet cac so :987,2564,abcde duoi dang tong cac luy thua cua 10
lam ca loi giai ra do
ai lam ho minh tick cho
b) Viet tich sau duoi dang mot luy thua :
2 . 2 . 2 . 3 .3 . 62 . 3
c) Tinh 27 . 75 . +25 . 27 - 150
Ai biet giai giup minh voi nhe!
viet ket qua cac tich sau duoi dang mot luy thua voi co so la so tu nhien nho nhat co the duoc :
2*4*8*32*64
3*9*27*81*729
co ai giup minh voi khong ,giup minh tra loi hai cau hoi nay voi !
Viet tich sau duoi dang mot luy thua :x . x2 .x3 .x4 .x5....x49 .x50 .x51 .x52
Tim cac so tu nhien x,y sao cho:(x+1) (y-2) =2
moi nguoi oi giup minh di chu !
cho A=1+2+2^2 +2^3 +...+2^200 .hay viet A+1 duoi dang mot luy thua
viet tich sau duoi dang mo luy thua co co so nho nhat:(23)5.25
Hay viet 2A + 1 duoi dang mot luy thua
Cho A= 1 + 3 + 32 + ..... + 32007
viet thuong 276 : 33 duoi dang mot luy thua
viet tich 2 nhan 4 nhan 8 nhan 16 nhan 256 duoi dang 1 luy thua voi so mu co so tu nhien nho nhat co the co
